To beat the final level: 1. As soon as the level begins click on the city and move it to the top ridge, (i put mine to the right a little, but the middle would work to i suppose.) AS THE CITY IS MOVING, put a collector on each side of the box so it builds as soon as it lands. You'll have just enough time to build a few collectors to power TWO blasters. put these on the upper left and upper right corners of the ridge with your city on it. This is will allow you to be at a draw with the creeper. From here build more collectors and reactors and fight back from there! =]
 "Creeper World Training Sim"){kind=icon}
 "Infectonator!"){kind=icon}